Pound-force/lbf
One pound-force, 1 lbf, is defined as the weight of a one avoirdupois pound, 1 lb, mass at standard gravity.1 lbf (pound-force) 4.448 N (newtons)1 N (newton) 0.2248 lbf (pound-force)NOTE The SI unit of force is the newton, symbol N. In the U.S., it is customary to specify the trigger pull force in pound-force, symbol lbf.NOTE Pound-force lbf is sometimes referred to as pound lb where the context refers to force rather than mass.
Committee
Firearms & Toolmarks
Date Added to Lexicon
Standard Source (Designation Number Title of Standard. Publisher, Place, Year.)
ANSI/ASB Best Practice Recommendation 107 Best Practice Recommendation for Measuring Trigger Pull of a Firearm and Estimating Its Uncertainty. AAFS Academy Standards Board (ASB), 410 North 21st Street, Colorado Springs, CO 80904, 2022.
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